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  1. P

    Assume that radon measurements are normally distributed

    with mean 4.1 and standard deviation 0.2. -Find the median of the measurement? -What is the probability the radon measurements exceed 4.5 picocuries?
  2. P

    Z scores

    Scores on a statistics final were normally distributed with a mean of 75 and a standard deviation of 8? -What proportion of the scores were above 90? -What proportion were below 65? -What is the 22nd percentile of the score?